Mobile storage tank



FIG. 1 is a top plan view of the mobile storage tank of this design.

FIG. 2 is a left side elevational view of the tank of this design.

FIG. 3 is a right side elevational view thereof.

FIG. 4 is a bottom plan view of the tank of this design.

FIG. 5 is a front elevational view of the mobile tank of this design; and,

FIG. 6 is a rear elevational view thererof.

The wheels shown in broken lines in FIGS. 2,3,6 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a mobile storage tank, as shown and described. 